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Keywords:
Image verification, Computer Applications-3D, CT, Radioprotection / Radiation dose
Authors:
Y. Shimomiya1, T. Shirasaka1, M. Tachibana2, H. Hamasaki1, K. Ogawa1, M. Namekata3, K. Kumagai2, Y. Nakamura1; 1Fukuoka, Fukuoka/JP, 2Hiroshima, Hiroshima/JP, 3Tokyo, Tokyo/JP
DOI:
10.1594/ecr2014/C-0949
Aims and objectives
In recent years,
owing to the developments in CT equipment technology,
it has become possible to reduce the noise introduced by filtered back-projection (FBP),
which had been the method for image reconstruction thus far.
The current image reconstruction method has shifted to utilize iterative approximation reconstruction.
However,
there have also been significant developments in workstation technology,
and an iterative approximation-imaging filter utilizing the total variation method (TV method) that processes images based on the DICOM image output from the CT device,
is now available.
The utilization of this iterative approximation-imaging filter allows us to reduce CT-Axial imaging noise,
and we expect to improve the quality of volume rendering images.
In this study,
in order to improvement of Image Quality on 320-multidetector CT Using Total Variation Technique of Three-dimensional Workstation,
we evaluated FBP images,
images processed through the TV method,
the modulation transfer function (MTF),
the noise power spectrum (NPS),
and contrast-to-noise ratio (CNR) from a low-contrast detectability viewpoint,
and clarified the utility of the TV method.